Lub ntiaj teb diatomaceous yog ib hom pob zeb sedimentary siliceous biogenic, feem ntau yog ua los ntawm cov seem diatom qub. Nws cov tshuaj lom neeg muaj pes tsawg leeg yog SiO2, muaj me ntsis Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, Na₂O, P₂O₅thiab cov organic teeb meem. Cov kev siv tseem ceeb ntawm diatomite yog cov khoom siv lim dej, cov khoom sau, cov khoom nqus, cov khoom nqa catalytic, cov khoom siv hauv tsev uas zoo rau ib puag ncig thiab lwm yam.